Printer s quoin



(No Model.)

W. WIGKBRSHAM. PRINTBRS QUOIN.

No. 496,547. Patented May 2, 1893.

me wanna PETERS e0. mmumm WASHINGTON. u c.

UNITED STATES I PATENT OFFICE.

VILLIAM WIOKERSHAM, OF BOSTON, MASSACHUSETTS.

PRINTERS QUOIN.

SPECIFICATION forming part of Letters Patent No. 496,547, dated May 2, 1893.

Application filed May 11, 1892- Serial No. 432,692- (No model-l I To all whom it may concern."

Be it known that 1, WILLIAM WIOKERSHAM, a citizen of the United States, now residing at Boston, in the county of Suffolk and State of Massachusetts, (though formerly at Worcester, in said State,) have invented a new and useful Improvement in Printers Quoins, as shown and described in the following specification and drawings.

The quoin herein set forth is not altogether new, as on the 12th day of May, 1890, I filed in the Patent Office an application for a patent on a printers quoin having two outside parts with three grooves or cavities in the adjacent sides of each, adapted to receive an instrument for expanding the quoins, formed of three disks placed side by side, having one cam on the edge of each, the middle cam having the greatest elongation on one side, and the two outside cams having their greatest elongation on the other side of their axes of motion, to expand the quoin as said instrument was turned by a key, by the middle cam acting in a groove of one of the outside parts, while the two outside cams acted in grooves of the other outside part or block of the quoin, in its expansion. Now itwas found that this triple disk worked admirably; nothing could exceed it in its efficiency in expanding the quoin and holding it firmly in its desired position. But it was also found that by exercising great ingenuity and a proper instrument, this triple disk could be turned in its place, making the planes of its disk vertical instead of horizontal when the quoin was in working position, in which case the quoinbe came useless until the disks were re-adj usted.

Now it is the leading feature of my present invention to provide spurs or projections on the adjacent sides of the two outside blocks near to the edges of the cams on the triple disk to prevent its getting'out of adjustment, as above explained, which will be-more clearly shown by reference to the drawings, inwhich- Figure 1, shows a perspective view of the quoin and the key. Fig. 2, shows a horizontal and longitudinal section through the middle of the two outside blocks with the spurs above referred to; it also shows a cross-section through said spur in block. Fig.3, is a horizontal section of the quoin before it is expanded, including the tri-disk and the spurs above referred to, to prevent said disk from getting out of adjustment. Fig. 4 is an inside View of one of the outside blocks, and Fig. 5, is the other outside block of the same quoin. Fig. 6, gives an inside view of aquoin having in the adjacent sides of the two blocks five grooves or indentations adapted to receive an instrument for their expansion, having five disks placed side by side, as shown in Fig.8. Fig. 7 shows an horizontal and also a vertical section of the tri-disk.

In the description of the several parts of my drawings, 1 is the female block into which are fitted the lugs of 2, the male block, 3, 4, are

the two lugs, and 5, 6, are the spaces at the ends of the block 1, for the lugs to fit into,

The four points, 7, 8, 9, 10, on the blocks 1 and 2, are to be bent, the points 7 and 8 are to be bent outward, and the points 9 and 10 are to be bent inward to secure said blocks together in such manner that the quoin may freely expand, yet prevent the two blocks from entirely separating, as shown in Fig. 3.

The tri-disk is shown in both vertical and horizontal sections at Fig. 7. The three disks 11, 12 and 13, are so placed together as to make the middle one, 12, projectin one direction, while the two outside ones, 11. and 13, project in the other direction, as to their axes of motion; two of these, 12 and 13, are shown in their places in the quoin fitted up ready for use in Fig. 3. The grooves or indentations in the adjacent sides of the blocks 1 and 2, for the tri-disk to work in, are numbered 24, 25, 26, and 27, 28, 29.

Fig. 8 is a vertical section of an instrument for expanding a quoin having five disks 14, 15, 16, 17 and 18, placed side by side, instead of three as heretofore described. This in some cases may be regarded as merely an equivalent of the tri-disk, yet in some cases it may be superior to the other, and therefore be. regarded as a new invention. The blocks 19 and 20 have five cavities in the adjacent sides of each adapted to receive the five cams shown in section in Fig. 8, to expand them in like manner as the tri-disk expands the blocks 1 and 2, in Fig. 3.

Now it has been found that by a skillful hand and a suitable instrument, the tri-disk may be turned quarter round so that the planes of the disks would be vertical instead of horizontal, as shown in Fig. 3, in which case the tri-disk would be inoperative in expanding the quoin. To prevent this I have invented spurs 21 and 22, the spur 22, being attached to, indeed cast onto, the block 1, and the spur 21, is cast onto the block 2, so that their inner ends are just below the disk 12, and between it and disk 13, and in these positions they absolutely prevent the tri disk from being misplaced or out of the proper adjustment for expanding the quoin. These spurs 21 and 22 may be used just the same when the instrument for expanding the quoin has five disks, as shown in Fig. 6, in its vertical position. This spur 22 is also shown in 15 a cross section of block 1, in Fig. 2.

23 is the key. Having thus explained my invention, I will state my claim to be- In printers quoins the spur 21 and the 20 spur 22 in combination with the blocks 1 and 2 and the plurality of disks 11, 12, and 13 constructed substantially as described and for the purpose set forth.

WILLIAM WICKERSI-IAM. Witnesses:

FRANK G. PARKER, WILLIAM H. PARRY. 

